JavaScript Formatter

What is Online JavaScript Formatter?

JavaScript Formatter is a free online tool for formatting and beautifying JavaScript code. JavaScript is a scripting language used in web browsers to provide interaction between user and screen as well as managing data structures and data flow. It may be a headache to read even your own code if it is not formatted properly. For increasing your productivity and providing easy code management, this tool will help you as JavaScript Beautifier to arrange your code lines with a standardization.

In general, HTML and CSS codes are shorter than JavaScript if you deal with a project where there are a lot of user interaction and data state management. Since JavaScript affects the functionality of your web application, it is not a good practice to write your code without formatting since any typo error may break your application. Even the design and UI of the page looks okay, it doesn't mean anything without functionality.

Since JavaScript has a complex structure, there are many options that must be configured while you are formatting your code. But, for preserving simpleness of the tool, only indentation size will be available as a setting and all other parameters will be used as default.

Here, you can see how formatting affects JavaScript code. As you see, it is hard to understand unformatted code event it is just a simple function.

JavaScript Formatting Before vs. After

How to use Online JavaScript Formatter?

JavaScript codes can be formatted with minimal effort by following.

1. Enter unformatted Javascript code that you need to beautify in input text area.
2. Indentation size may be changed if you need a spacing other than 2-spaces. Options are available from 1 to 5.
3. Click the "Format" button to end the process. Formatted JS code will be shown on output field.
4. Download the formatted script as a .js file or copy it to use it in your projects directly.

Frequently asked questions

What does it change?

Indentation, line breaks and spacing. Your logic, names and structure are untouched — this is presentation, not a rewrite.

Can it make minified code readable?

It restores the shape, which is usually enough to follow the flow. What it cannot bring back are the comments and the original variable names, since a minifier that renamed things threw that information away.

Does it fix syntax errors?

No. It formats valid JavaScript. If the code will not parse, the formatter will tell you by failing rather than by guessing what you meant — which at least narrows down where the problem is.

Should I use this instead of Prettier?

For a pasted snippet, a file from somewhere else or a quick look at production code, this is faster. For your own project, a formatter in the editor and in the commit hook is the right answer — consistency matters more when several people are typing.

What about shipping it?

The JavaScript Minifier goes the other way, and the Code to Image Converter turns a tidied snippet into something shareable.